at 9:00 on the morning of August 20th, with a loud noise came from the deep tunnel blasting, Xining tunnel project by the first Chinese China Railway five Bureau Lanzhou second double project headquarters responsible for the construction of the Department to ensure smooth traffic, laying across the board on time to lay a solid foundation.

Xining tunnel length of 5750 meters, is located in Xining City, Lanzhou Xinjiang Railway second double line points and throat control project, is the former Ministry of Railways (now China railway company) as a high risk of railway tunnel. The geological condition of the tunnel is very complex, including 1368 meters of shallow buried under the west of the highway, the construction of intensive residential areas, factories and mines, markets, warehouses and irrigation canals and other water rich areas. Only 9 meters at the lowest point. Construction is difficult, high security risk, in the same conditions in the tunnel is also rare. (author: Kong Xiangrui Luo Changmin Yuan Rongsheng Xie Chongzhi)

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